6. Operation
Projekt Elektronik
MESS - UND REGELUNGSTECHNIK GMBH
Page 68
Figure 53 Usage AS-probe at ±3 V
The pin configuration of the probe is shown in the graphic below. All other
pins are reserved for future use ore are only relevant in combination with the
Teslameter FM 302. These pins have to remain unconnected.
Figure 54 Pin configuration AS-probe at ±3 V
Like shown in the inner structure schematic the output signal at pin 1 is
always referred to the ground signal at pin 2 and 3. This ground and the
supply vo3 V (pin 4) and –3 V (pin 5) have to be provided from the
outside.
The AS-active-probes may not be powered with asymmetric voltages.
It should be observed, the in the probe a connection between GND,
plug shield, plug case and cable shield is made. At probes with brass
protective tube, this is also connected to GND. Possibly an isolated
installation of the probe is necessary to prevent an unintended
connection between measuring GND and protective earth.